1918.] Stanley Kemp: Dccapiuhi of flic Iiilc Lake. 



89 



aro dull olivaceous speckled with black. The veutral surface is yellow- 

 ish and the mouth-parts are stained with dull olive. Individuals from 

 the Inle Lake are usually more brightly coloured than those from streams 

 in the same district." 



This is apparently the only cral) that makes its way into the central 

 region of the Inle Lake, on the Ijottom of \\liich it is occasionally found. 

 It is more abundant among the roots of the floating islands at the edge 

 of the lake, and also frequents small liill-streams. 



The Sjiecimens in the collection are from Yawn gh we State ; from the 

 Inle Lake, 3U00 ft., and from He-Ho stream, 3800 ft. The types, 

 which are from the former locality, bear the number 9771/10, Zool. Surv. 

 Ind. 



Potamon (Potamon) curtobates, sp. nov. 



Plate xxiv, tigs. 5, (J. 



This species is allied to P. abbold. Ratlibuii. /-'. nioniatioti, Rathbun, 

 and P. pealianum (Wood-Mason), but differs from all in tlie extreme 

 depth and convexity of the carapace. 



The length of the carapace is a trifle less than three quarters its 

 greatest breadth ; it is thus comparatively short and broad. The depth 

 is always conspicuouslv more than half the greatest breadth (pi. xxiv, 

 figs. 5, v.. 



The cervical groove is well defined posteriorly and the point where 

 it cuts the post-orbital crests is usually clear ; in the intermediate part 

 of its course it is exceedingly obscure. The mesogastric areola is remark- 

 ably broad, its greatest breadth being almost or quite equal to one-third 



¥\v,. 3. — I'otiuiKiii {pohnnon) curlobates, sp. nov. 

 (I. OutliiK- of left side of carapace. 



b. "J'tiiid niaxillipctk'. 



c. AbcloiiR'ii of nuilc. 



the breadth of the carajiace. (in P. pcdltiniuiii it is oiiK- one (piarter 

 the breadth.) The antei'o-latei'al boundaries of the ai'eola are usually 

 obsolete in specimens of mediuu) size, but are visil)le in a very old male. 

 The two small lobules behind the posterior limit of the cervical groove 

 are not as a rule comj)letely tleflned. The upj)er suiface of the carapace 

 is very strongly convex fore and aft and slightly so from side to side ; 



